Inking-ribbon for type-writing machines.



No. 855,559. PATBNTED JUNE 4.1907. M. H. GHAPIN.

INKING RIBBON FOB. TYPE WRITING MACHINES.

APPLICATION IILI ID OOT.9, 1905.

WITNEEEEE. INVENTUR.

5 H15 ATTORNEY UNITED STATES PATENT OFFICE.

MURRAY H. CHAPIN, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO UNIONTYPEVVRITER COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORA- TION OF NEWJERSEY.

lNKlNG-RIBBON FOR TYPE-WRITING MACHINES.

Specification of Letters Patent.

Patented June 4, 1907.

Application filed October 9,1905. Serial No. 281,957.

' new and useful Improvements in Inking- Ribbons for Type-WritingMachines, of which the following is a specification.

My invention relates to inking ribbons for typewriting and likemachines, and more particularly to inking ribbons in which the ribbon isdivided into inking fields of different colors or characteristics. Incertain ribbons of this character heretofore employed the differentcolor fields were contiguous one to another; one color. field commencingwhere the other left off, and in consequence the ink of one field wouldrun into and blend, with that of the other field,.especially at thevicinity of the meeting edges, oftenin this manner rendering the ribbonunsalable even before it left the factory. In such prior ribbons, wherethe edges of the different fields are in contact, the different inkshave a marked tendency to absorb each other, which results in oneinkextending comparatively far into the field of the other ink, thuslargely destroying its color values;

The object of my invention is to overcome the above objections and toprovide ribbons in which the liability of the ink to flow from one inkfield of the ribbon into another is wholly avoided or reduced to aminimum.

To the ab ve and other ends which will hereinafter appear, my inventionconsists of an ink ribbon constructed in the manner hereinafterdescribed and pointed out in the applinded claim.

' the accompanying drawing, which shows one form of my inventionFigure 1is an enlarged face View of a piece of .ribbon made in accordance withmy invention, and

Fig. 2 is a transverse sectional view of the same.

The ribbon in the resent instance is of uniform weave or thic essthroughout and is shown as divided into two adjacent inking fields, 1and 2, which are of different colors or characteristics, such as red'andblack, purple and black, or copying ribbon in one field and recordribbon in the other field.-

Thus it may be assumed that the field 1 is such that it will roduce ablack imprint and the field 2 such tliat it will produce a red i1nprint.These two fields are parallel and extend longitudinally of the ribbonbut they are separated by an intermediate portion or strip'3 which isuninked, so that the two ink fields 1 and 2 are not contiguous or, incontact. By this construction the ink of one field will not by capillaryattraction or ab' sorption run intothe ink of the other field. The widthof the uninked strip 3 is so small that it does not take ap reciablyfrom the effective width of the rib on, or the inking surfaces thereof;nevertheless as has been found in practice it is sufficient to keep thecoloring matter of one field from gettingover into and mixing with thecoloring matter of .the adjacent field to the detriment of the colors.

By dividing the ink fields in the manner described, there is no additionwhatever at any place to the thickness of the ribbon, the ribbon as awhole being the usual fabric of uniform weave and thickness throughout.In makingthe ribbons, the fields or sections 1 and 2 are impregnatedwith the or coloring matter in the customary or any suitable way, butcare is taken not to ink the intermediate portion or section 3, whichshould be left plain.

' It should be understood that any suitable number of inking fields maybe employed on each ribbon, as two, three or four; that the difierentfields may be of difierent colors, or the ribbon may be made up with arecord field, a co ying field and a red or other colored fiel j or, thediflieient ink fields may be merely of difierent colors and all copyingor record.

What I claim as new anddesire to secure by Letters Patent, is

1 1. An inking ribbon of uniform thickness throughout and havinglongitudinally extending inking fields of different characteristics andhaving also an intermediate "longitudinally extending uninked portionseparating said inking fields.

2. An inking ribbon of uniform thicknessthroughout and hearinglongitudinally ex- Si ned at Bridgeport, in the county of tending inkingfields of different characteristics and having also an intermediatelongiday of October, A. D. 1905.

tudinally extending uninked portion separat- I MURRAY H. CHAPIN. 5 ingsaid inking fields; said uninked portion I Witnesses v being of the samethickness and weave as the KATHERINE M-. FARRELL,

inking fields of the ribbon. .HELEN MoseoW TL.

Fair 'eld, and State of Connecticut this 4th

